DDS155 series single phase electronic watt-hour meter uses imported specific large-scale integrated circuits and other advanced technology&period;It can measure AC single phase active electric power which the rated voltage is 220V and frequency is 50Hz&period;

It can measure forward and reverse active power accurately and it calculates accumulatively in the same direction&period;

It can prevent electric larceny at the same time&period;

It outputs heartbeat through optical couple&period; LED displays electricity consumption&comma;so that it si easy to control&period;

2&period; Electric Power Measurement-- Positive active power&comma; reverse active power and power in A&comma; B&comma; C phase which can be measured&period;

3&period; Intelligent Design— Imported single-chip which controlled by microcomputer&comma; full digital metering&comma; with advantages of high accuracy&comma; good linearity&comma; wide range&comma; low consumption and prevent from electricity stolen&period;

4&period; Reliable Design-- Perfect power source and electromagnetism compatible design&comma; which are suitable to the strong electromagnetism disturbance and big occasion of power source fluctuation&period;